Roll for beating-engines.



A. J. ALLISON;

ROLL FOR BEATING ENGINES.

APPLICATION FILED MAY 3, 1911.

1,273,982. Patented July 30, 1-918.

2 SHEETSSHEET I.

A. J. ALLISON.

ROLL FOR BEATING ENGINES.

APPLICATION FILED MAY 3. 1911.

Patented July 30, 1918.

2 SHEETSSHEET 2.

' 56 hereto the coil.

4 UNITED STATES PATENT OFFICE.

" I .ALBEEBT .T. ALLISON, or DAYTON, OHIO, AssIcNOn TO THE A. A. sm'onns sons comrnnr, or DAYTON, OHIO, a CORPORATION or OHIO.

ROLL FOR BEATING-ENGINES.

Specification of Letters Yatenti Patl lted J uly 30, 1918 Application filed May8,1917 Serial No. 166,102,

To all whom it may concern:

Be it known that I, ALBERT J. ALLISON, a citizen of the United States, residing at Dayton, in the county of Montgomery'and State of Ohio, have invented certain new and use ful Improvements in Rolls for Beating-Engines, of which the following is .a' full, clear,- and exact description.

. My invention relates to means for clamping the fly bars on the rolls of heating enginesused in paper pulpv mills. A beating roll usually consists of a cylindrical core, mounted on a shazft on which the roll is carried and by which 'it.is rotated. On this roll a large number of plates, called fly bars, are clamped, alternating with strips of wood. The bars are arranged parallel to the axis and radiate from the roll. The intervening Wood, strips are considerably narrower radially than thebars, and when completed the roll presents a plurality of radiating, longitudinalsteel blades. been customaryto secure the fly bars to the roll with a ine'tiil ring or hoop at' each end 26 of the roll. These were put on red hot and when they contracted drew the fly bars down tightly to the core. One objection to this method .is the difiiculty of getting the bars ofl when necessary, and the possibility that when the bars are renewed, which often has to be done in the field by unskilled labor, the rings are not properly shrunk on again. Another objection is that a slight difference in the size of a bar; the bar being a little too narrow, for example, prevents this bar from being clamped by the ring. Or a bar which is too broad may'prevent the ring clamping bars on each side of it. In operation these bars have to coo erate with a group of stationary bars an one or more oose fly bars in a roll may result in injury to the parts and consequent delay and expense.

The object of; my invention is to overcome the difficulties mentioned, at the same time providing for inequalities in the parts, so that in case the bars are not uniform in width, which is quite likely to be thecase they will still be securely clamped to the core.

In the accompanying drawings: I

Figure 1 is an elevation of my improved beater roll, partially sectional, showing the clamping rin in place ready to be drawn together for t e purpose of clamping the fly Until now it has Fig. 2 is a similar view, with the rings drawnto place, showing the eflect upon the tongues of the fly bars.

Fig. 3 isan end view of the roll with the clamping ring removed, showing the alternate arrangement of the fly bars and wood strips.

Fig. 4 shows a modification; a diflerent way offorcing the rings into place.

Like numerals refer to similar parts in all of the views.

The cylindrical core 10 is mounted on a shaft 11 in' the ordinary or any suitable manner. At each end the-core is slightly tapered, as at 12-12. The fly bars 13 are broad, relatively thin plates approximately the length of the core and at each end, of the bars are notched as at 14, leaving projecting tongues 15. In their normal state the inner edges of the bars are rectilinear, and therefore there is a space beneath the tongues formed by the taper of the core. The wood strips 16, which alternate with the bars also have notches, '17, in their ends. 1 T A ring 20 is provided for'e'ach end of the roll these rings having a tapered interior. In the preferred construction the rings are m'ounted on or' madeintegral with circular disks 21. As seen in Fig. 1 the rings'are of such diameter that their'large ends will just start on the ends of the tongues15 when the bars are in position around the core. By means of bolts which pass through the core the plates and rings are'forced toward each other until they reach the position 90 shown. in Fig. 2. 1 In this figure it, is seen' that the tongues have been deflected inward by the taper of the rings but that there remains some space between the tongues and the beveled portions of the coil. In case of inequality in the width of the tongues some of them may be deflected more than others, but since considerable force is necessary to secure even a slight deflection of the tongues it is clear that each of the bars is heldfirmly against the core by the tension of its own tongues. When the bars require renewal it is I only necessary to unscrewthe nuts and remove the rings, which can be done with a few. blows of a hammer.

In the modification shown in Fig. 4 the plates are forced toward each other by large nuts screwedon the shaft, which is threaded for the purpose. Other modifications are possi le Without departing {from the spirit 11pof the invention or exceeding the scope of the appended claims. That I claim is as follows: 1. A beater roll, comprising a cylindrical core, the end of which is slightly tapered,

a plurality of fly bars arranged around the core, each bar having a tongue which extends over the tapered portion of the core, a ring adapted to encircle the tongues, said ring having a tapered interior whereby when it is forced axially with reference to the core the tongues are drawn toward the axis of the core, the space beneath the tongues afforded by the taper of the core permitting more or less deflection of the tongues, so that each bar is clamped against the core by the tension of its own tongue; and means for forcing the ring exi-ally.

2. A beater roll, comprising a cylindrical 1 core, each end of which .is slight-1y tapered, a plurality of fly bars arranged around the core, the bars having at each end tongues which extend over-the tapered portions of the core, a pair of rings adapted to encircle the tongues, said rings having tapered in; teriors whereby as the rings are forced toward each other the tongues are drawn toward the axis of the core, the space beneath the tongues, afforded by tapering the core,

permitting more or less deflection of the f tongues, so that each bar is clamped against the corebythe tension of its own tongues; and means for forcing the rings toward each other. i

3. A beater roll, comprising a cylindrical core, each end of which is slightly tapered,

a plurality of fly bars arranged around the core, the bars having at each end tongues which extend over the tapered portions of the core, a pair of rings adapted to encircle the tongues, said rings having tapered interiors whereby as therings are forced toward each other the tongues are drawn toward the axis of the core, the space beneath the tongues, afforded by tapering the core, permitting more or less deflection of the tongues, so that each bar is clamped against the core by the tension of its own tongues, circular plates .on which the rings are mount ed, and bolts which pass through the plates and throughthe core whereby the plates and rings are drawn toward each other. i

4. A beater roll, comprisin a cylindrical core, each end of which is slig tly tapered, ,a' plurality of fly bars and stripsof w'ood ar ranged alternately around the core, the bars having at each end tongues which extend over the tapered portions of the core, a pair of rings adapted to encircle the tongues and ends of the wood strips, said rings having tapered interiors whereby as the rings are forced toward each other the tongues are forced toward the axis of the core, the space beneath the tongues, due to tapering the core, permitting deflection of the tongues, so that each bar is lamped against the core by the tension of its own tongues; and means for forcing the rings toward each other.

5. A- beater roll, comprising a core, fly

bars arranged around said core and resilient means for clamping the bars thereto.

6. A beater roll, comp-rising a core, fly bars arranged around said core and means for employing the resiliency of portions of the barsthemselves for clamping the bars against the core. a e j In testimony whereof I aflix my slgn'ature in the presence of two subscribingwitnesses.

, ALBERT J. ALLISON.

' Witnesses:

F. K. FAssE'1'1.,

M. E. WoBrMAN. 

